Exhaust-heated intake manifold



May 14, 1929. E. w. SEAHOLM 1,713,

EXHAUST HEATED INTAKE MANIFOLD Filed May 29, 1926 Jwtnnlioa "@E? Z V I I 51714:? ZZZJmbaZm Patented May 14, 1929 UNITED STATES PATENTOFFICE.

ERNEST W. SEAHOLM, OF DETROIT, MICHIGAN, ASSIGNOR TO GENERAL MOTORS COR- PORATION, OF DETROIT, MICHIGAN, A CORPORATION OF DELAWARE.

EXHAUST-HEATED INTAKE MANIFOLD.

Application filed May 29,

der block and an exhaust manifold.

The chief object of the invention is to provide a simple and practical means to protect the cvlinder block from strains and distortions which tend to throw the cylinder block out of alignment.

Another object of the invention is to provide a yielding connection between the exhaust heating chamber of the intake header and the exhaust manifold.

Other objects of the invention will appear hereinafter.

In the drawing:

Figure 1 is an end elevation View of a V- type engine, partly shown in dotted lines and illustrating in full lines, the intake header with a heater jacket connected to the exhaust manifold according to this invention. Figure 2 is an enlarged, partly sectional, fragmentary view of the intake header and its connections, illustrating the invention in detail.

Like numerals of reference refer to corresponding parts.

eferring now to the drawing, 10 desig nates the cylinder blocks of a V-type form.

This invention deals principally with the intake header 11, which joins together the two cylinder blocks, and supports the car buretor 12 at the center. The intake header 11, is arch shaped as shown and is mounted between the inlet openings 13 of the intake manifold and secured thereto by bolts 14.

An integral jacket 15 surrounds the top'of the intake header and provides a heating chamber 16 to heat the fuel mixture flowing from the carburetor 12. The said jacket has a clean out opening 17 fitted with a suitable cover 18. The jacket also has the openings 19 in each end, which are formed with internally threaded flanges 20.

A connecting pipe 22 carrying at one end the deflector 23, is passed through each opening 19 and suitablymade fast to the exhaust manifold 24, as by bolts 25 engaging the collar 26 of the pipe and the flange 27 of the exhaust manifold.

The space in the opening 19, about the nut 29 adjacent the said internal flange is filled with a suitable packing 28 which is compressed about the pipe and flange for effect- 1926. Serial No. 112,636.'

ing a gas tight connection atthat point, by

appreciable relative movement between the intake header and cylinder block and the intake manifold takes place as the temperature of the engine is varied.

The connecting pipe or pipes 22 rigidly carried by the exhaust manifold slide through the packing 28 a distance to accommodate for the expansion. This, of course, saves the intake header and cylinder blocks from receiving the strains which otherwise would be caused by the expansion, if the pipe 18 pa?! rigidly connected to the intake mani- By the above described arrangement, it will be clear that the cylinder blocks are fully protected fromthe stresses which generally operate to throw them out of position.

Modification of the above may be made within the spirit and scope of the invention.

What I claim is:

1. The combination with an intake header of an internal combustion engine having a heating chamber, the wall of which has an opening and a stufling box, of an exhaust manifold, a connecting pipe having one end rigid with the exhaust manifold and the other end yieldably joined to the heater chamber by the said stuffing box for protecting the engine from expanding stresses caused by unequal expansion in the said parts, and whereby the engine alignment is maintained constant.

2. The combination with a cylinder block of an internal combustion engine, of an intake header having a heating chamber for heating the fuel charges, which is formed with recessed opening to receive a stufling box gland, an exhaust manifold, a tubular member for yieldingly connecting the intake header and manifold together arranged and retained within the said opening by the said gland whereby the expansion in the said parts is taken care of and the alignment of the cylinder block is kept constant.

3. The combination with the intake and exhaust manifolds of a. V-type motor, of a cross header connecting said intake manifolds and having a heating chamber associated therewith and conduits from sald exhaust mam folds having expansible connections into said heating chamber.

4:. In combination with an internal combustion engine, a heating chamber, a member connected to the exhaust system of the engine and having its end freely disposed within the heating chamber, and a joint permitting exing chan1ber,a pipe leading from the engine block to the-heating chamber, and means attached to the pipe for deflecting exhaust gases onto the wall of the heating chamber.

7. The combination of claim 6, said means comprising an angle shaped plate attached to the end of the pipe.

and connected to both banks of cylinders, said manifold including a heating chamber, pipes from the two banks extending into the heating chamber, and means within the chamber at the pipe ends for deflecting the exhaust gases against the chamber wall.

10. The combination of claim 9, said chamber having a clean out opening, and a cover for said opening.

' In testimony whereof I affix my signature.

- ERNEST lV. SEAHOLM. 

